Self Activated Power Brake

ABSTRACT

A Self Activated Power Brake comprising a rotating brake disk fitted coaxially to a wheel and the main brake caliper/shoes fitted on dead axle/body frame. A sliding mechanism having shaped resembles to arc in orbit of brake disk. The mechanism having in two major parts, one is sliding and other is fixed which consists sliding bed and fitted with main power brake caliper. A pilot brake caliper, which is in sliding mode (floating mode), fitted on sliding part of the said sliding mechanism. At least one power transmitting means out of suggested means is needed to be linked the sliding pilot brake caliper to main power brake caliper to transfer the friction power of the pilot brake caliper after required amplification of the same. On braking action, the pilot brake caliper which is actuated by fluid line coming from master cylinder, actuates main power brake caliper through at least one power transmitting means as aforesaid to do the job as a SELF-ACTIVATED POWER BRAKE.

FIELD OF THE INVENTION

This invention relates to “Self Activated Power Brake”.

BACKGROUND OF THE INVENTION

The existing power brakes in automobiles, industries, railways etc. are activated by externally generated power through electric motor, hydraulic pump, air compressor or some other means. The power brake system is needed to assist or ease the driver of the vehicle or operator of the machine, as it requires a lot of power to stop any heavy moving object. This existing facility increases cost like the cost of electric motor, hydraulic pump or air compressor and running cost of the system too. In every braking system in a machine external force is required to stop or slow down the rotating wheel or any part of the machine, making the system as a whole more complicated and bulky.

OBJECT OF THE INVENTION

Object of this invention is to obviate the above drawbacks by providing a “Self Activated Power Brake”.

SUMMARY OF THE INVENTION

To achieve the said objective, this invention provides A Self Activated Power Brake comprising:

-   -   a rotating disk/drum coaxially fitted to a wheel,     -   a housing to hold brake shoes of a brake in a fixed position         with respect to the rotating disk/drum,     -   a brake pedal system to transmit motion generated by hand or         foot to at least one actuating pilot caliper,     -   said pilot caliper is attached to at least one actuating         mechanism, which actuates said brake shoes.

The actuating mechanism comprising:

-   -   at least one linkage mechanism to link said pilot caliper to at         least one transmitting means so that force from pilot caliper         can be transmitted to said transmitting means,     -   said transmitting means to apply force on at least one engaging         means,     -   at least one engaging means to engage said brake shoes to said         rotating disk/drum when force is applied.

The pilot caliper comprising:

-   -   at least one engaging brake shoe to engage to said rotating,         disk/drum when motion is transmitted from said brake pedal         system,     -   a movable holding frame to hold said engaging brake shoes.

The brake is a disc brake, a drum brake, a hydraulic brake, a pneumatic brake or a railway mechanical brake.

The linkage mechanism is either a mechanical link or a sliding piston arrangement.

The transmitting means is at least one lever system or at least one V shaped slot or at least one master cylinder hydraulic system.

The engaging means is at least one sliding piston arrangement or at least one V shaped protrusion or at least one hydraulic sliding piston arrangement.

The actuating mechanism is of oval shape so that when said pilot caliper engages to said drum brake, said oval shaped actuating mechanism tilts and engages the brake shoes by at least one mechanical means (E5).

The actuating mechanism is of eye shape so that when said pilot caliper engages to said drum brake, said eye shaped actuating mechanism tilts and engages the brake shoes by hydraulic means (E6).

The pilot caliper engages to said disc brake and actuates said linkage mechanism, which further transmits force to said transmitting means so that it enables the engaging means to engage the brake shoes to said rotating disk/drum.

BRIEF DESCRIPTION OF THE INVENTION

The invention will now be described with reference to accompanying drawings:

FIG. 1 shows the sectional view of “Self Activated Power Brake” for disc brake with mechanical lever.

FIG. 2 shows the sectional view of “Self Activated Power Brake” for disc brake with V shaped arrangement.

FIG. 3 shows the sectional view of “Self Activated Power Brake” for disc brake with two V shaped arrangement.

FIG. 4 shows the sectional view of “Self Activated Power Brake” for disc brake with hydraulic arrangement.

FIG. 5 shows the side view of “Self Activated Power Brake” for drum brake with mechanical arrangement.

FIG. 6 shows the side view of “Self Activated Power Brake” for drum brake with hydraulic arrangement.

FIG. 7 shows the side view of “Self Activated Power Brake” for disc brake with V shaped arrangement.

FIG. 8 shows the side view of “Self Activated Power Brake” for disc brake with hydraulic arrangement.

FIG. 9 shows the sectional view of Pilot Caliper of “Self Activated Power Brake”.

FIG. 10 shows the perspective view of “Self Activated Power Brake” for railways.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings Self Activated Power Brake is made up of a rotating disk/drum (A) coaxially fitted to a wheel (not shown in figures). A housing (F) to hold brake shoes (G) of a brake is provided in a fixed position with respect to said rotating disk. A brake pedal system connected to hydraulic light pressure line (N) to transmit motion generated by hand or feet to at least one actuating pilot caliper (B). Said pilot caliper (B) is attached to preferably one actuating mechanism, which actuates said brake shoes (G). The actuating, mechanism has preferably one linkage mechanism (M) to link said pilot caliper to at least one transmitting means, so that force from the pilot caliper can be transmitted to said transmitting means. Said transmitting means applies force on at least one engaging means, when force is transmitted. Said engaging means, engages said brake shoes (G) to said rotating disk (A) when force is applied. The pilot caliper (B) is made up of at least one engaging brake shoe (P) to engage to the rotating disk, when motion is transmitted from said brake pedal system and a movable holding frame (Q). Said linkage mechanism consists of a pilot caliper having sliding piston (C) connected to pilot caliper (B) at one end and said actuating mechanism at other end.

FIG. 1 shows Self Activated Power Brake for disc brake with mechanical lever according to one embodiment of the present invention. In this embodiment actuating mechanism is a mechanical lever system (D1) with two flexible L shaped levers (L1 and L2) so that when actuating mechanism is actuated said levers (L1 and L2) push engaging means (E1) so as to engage the brake shoes (G) to the rotating disk (A).

FIG. 2 shows Self Activated Power Brake for disc brake with V shaped arrangement according to one embodiment of the present invention. In this embodiment actuating mechanism is an arm (D2) with a V shaped slot so that when actuating mechanism is actuated said V shaped slot moves and pushes V shaped protrusion of engaging means (E2) so as to engage the brake shoes (G) to the rotating disk (A). Alignment and centering is done by main brake housing on mounted pin (H).

FIG. 3 shows Self Activated Power Brake for disc brake with two V shaped arrangement according to one embodiment of the present invention. In this embodiment actuating mechanism is an arm (D3) with two V shaped slot so that when actuating mechanism is actuated said V shaped slot moves and pushes both V shaped protrusion of engaging means (E3) so as to engage the both brake shoes (G) to the rotating disk (A) uniformly from both sides so wear and tear in both the brake shoes are uniform. This principle can be used in other embodiments as well. Alignment and centering is done by adjusting screws (J3 and K3).

FIG. 4 shows Self Activated Power Brake for disc brake with hydraulic arrangement according to one embodiment of the present invention. In this embodiment actuating mechanism is a master cylinder (D4) so that when actuating mechanism is actuated said master cylinder applies pressure on hydraulic sliding piston (E4) so as to engage the brake shoes (G) to the rotating disk (A).

FIG. 5 shows Self Activated Power Brake for drum brake with mechanical arrangement according to one embodiment of the present invention. In this embodiment actuating mechanism is an oval shaped arm (D5) so that when actuating mechanism is actuated said oval shaped arm moves and pushes concave shaped engaging means (E5) so as to engage the brake shoes (G) to the rotating disk (A). Tension spring (I) is connected to said brake shoes (G) to keep them untouched to the drum in ideal condition. Gap adjusting arrangement (H) is provided to adjust gap between said shoes (G) and said drum (A).

FIG. 6 shows Self Activated Power Brake for drum brake with hydraulic arrangement according to one embodiment of the present invention. Engaging brake shoe (P) is connected to two sliding piston cylinders (C) connected to hydraulic pressure line (N) to engage with the rotating drum (A). In this embodiment actuating mechanism is an eye shaped arm (D6) so that when actuating mechanism is actuated said eye shaped arm tilts and pushes engaging means (E6) so as to build up pressure in hydraulic master cylinders (R) which further build up pressure in main hydraulic cylinder (K) to engage the brake shoes (G) to the rotating drum (A). Tension spring (I) is connected to said brake shoes (G) to keep them untouched to the drum in ideal condition. Gap adjusting arrangement (H) is provided to adjust, gap between said shoes (G) and said drum (A).

FIG. 10 shows Self Activated Power Brake for disc brake with mechanical lever according to one embodiment of the present invention for railways. In this embodiment actuating mechanism is a mechanical lever system (D10) so that when actuating mechanism is actuated engaging means (E10) engages the brake shoes (G) to the rotating disk (A).

Said Self Activated Power Brake can be used in a disc brake, a drum brake, a hydraulic brake or a pneumatic brake or mechanical brakes of railways. Force applied by the brake shoes on the disc/drum is multifold of the force applied by the driver/operator on the brake pedal as the pilot caliper generates the actual force for the brake shoes. Again as the actual force is generated by the pilot caliper, when rotating disk/drum is stopped completely said force becomes zero and the main brake shoes are released from the disk.

Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternate embodiments of the invention, will become apparent to persons skilled in the art upon reference to the description of the invention. It is therefore contemplated that such modifications can be made without departing from the spirit or scope of the present invention as defined. 

1.-11. (canceled)
 12. A self-activated power brake comprising: a floating (sliding) brake caliper assembly on its arc shape bed called pilot brake caliper, mechanical and hydraulically operated means to transfer the friction power of pilot brake caliper after necessary amplification as needed for power braking action to main power brake caliper. a main power brake caliper fixed along with sliding mechanism on dead axle/body frame capable to receive the said amplified power to complete power braking function along with pilot brake caliper simultaneously on same brake disk, said self-activated power brake optionally comprising: one pilot caliper/brake shoe fitted on a orbit arc like shape sliding mechanism in reference of a brake disk/drum fitted on rotating axle near wheel, power transmitting means, which is an actuating mechanism that links Main power brake caliper to said pilot caliper that is mounted on the sliding mechanism as aforesaid, a main power brake caliper fitted on dead axle or stationary frame of vehicle/machine, duly linked to the said actuating mechanism/power transmitting means as aforesaid, a hydraulic fluid line connected to Pilot brake caliper cylinder from master cylinder having pedal or lever which has to be depressed for stopping motion of rotating disk/drum.
 13. The self-activated power brake as claimed in claim 12 further comprising: the orbit arc like sliding mechanism wherein the said pilot caliper is mounted on the sliding arm (part) that slides in limited distance as required on its bed. This mechanism covers about three forth-circumstantial area of the brake disk. the fixed bed portion of the orbit like sliding mechanism is mounted on dead axle or body frame as said along with main brake caliper.
 14. The self-activated power brake as claimed in claim 12 further comprising: a power (an auxiliary friction brake force) that is generated instantly by pilot brake caliper due to friction of rotating disk on attachment of pilot brake pads on it during the braking action. The said friction power which has to be collected with minimum possible losses, to be amplified and to be delivered it to main brake caliper/shoes through power transmitting means. the power transmitting means comprising at least one out of following suggested means and many more according to the concept of the invention may be possible as design option to meet the main the purpose of the invention as aforesaid as to collect, to amplify and to deliver the available friction power from pilot brake caliper to main power brake caliper. a mechanism of the mechanical levers pivoted on its center pins mounted on fixed portion of sliding mechanism. The said levers provide the path of power transmitting from pilot caliper to main caliper, Power amplification can be done by the ratio of distance of the arms from connected link pin and center pin of the lever. A mechanism of mechanical V and Tooth shape arc plates combination can be utilized to meet the purpose of power transmitting as above said. The angles of V Tooth with required degree of both side pads depressing sliding plates amplify the obtained power and deliver the same at main brake pads effectively.
 15. The self-activated power brake as claimed in claim 12, further comprising: a master cylinder an actuating mechanism fitted in fix portion of sliding mechanism with connected its push rod to sliding part of the sliding mechanism, which also holds the pilot caliper, a pilot brake caliper mounted in moving (sliding) part of the sliding mechanism, said, said pilot brake pads depressing cylinder of the pilot brake caliper is connected through fluid line to conventional master cylinder of the vehicle/machine, a main power Brake caliper is fitted along with fix part of sliding mechanism to the dead axle/body frame of the vehicle/machine said main power brake pads depressing cylinder is connected through fluid line to the master cylinder fitted nearby in same fix part on which the main brake caliper mounts.
 16. The self-activated power brake as claimed in claim 12, further comprising: a round arch shape holding bed in circumstantial area of brake disk, wherein bed shape may be rectangular dimensions which can hold in sliding manner the sliding part from up and down, left and right sides with minimum clearance margin to avoid jam condition, said fixed holding part of the mechanism covers about one third circumstantial area of the brake disk, which provides the fitting of itself with main brake caliper to dead axle/body flame and the master cylinder (actuating hydraulic mechanism) of main power brake caliper is also mounted in this part, a sliding part in same shape as above said which can slide easily in its bed area said part covers about three forth of circumstantial area of the disk and having enough strength to hold the pilot brake caliper and to absorb the thrust thereof when in operation.
 17. The self-activated power brake comprising: a floating (sliding) brake caliper assembly on its arc shape bed called pilot brake caliper, mechanical and hydraulically operated means to transfer the friction power of pilot brake caliper after necessary amplification as needed for power braking action to main power brake caliper. a main power brake caliper fixed along with sliding mechanism on dead axle/body frame capable to receive the said amplified power to complete power braking function along with pilot brake caliper simultaneously on same brake disk, said self-activated power brake optionally comprising: one pilot caliper/brake shoe fitted on a orbit arc like shape sliding mechanism in reference of a brake disk/drum fitted on rotating axle near wheel, power transmitting means, which is an actuating mechanism that links Main power brake caliper to said pilot caliper that is mounted on the sliding mechanism as aforesaid, a main power brake caliper fitted on dead axle or stationary frame of vehicle/machine, duly linked to the said actuating mechanism/power transmitting means as aforesaid, a hydraulic fluid line connected to Pilot brake caliper cylinder from master cylinder having pedal or lever which has to be depressed for stopping motion of rotating disk/drum; wherein said pilot brake caliper comprising a conventional disk brake caliper cylinder with pads in case of disk brake or a customized brake shoe and cylinder as filed figures mounted in sliding part of the sliding mechanism as said in claim
 16. 18. The self-activated power brake as claimed in claim 16, wherein said pilot brake caliper comprising a conventional disk brake caliper cylinder with pads in case of disk brake or a customized brake shoe and cylinder as filed figures mounted in sliding part of the sliding mechanism as said in claim
 16. 19. A self-activated power brake comprising: a floating (sliding) brake caliper assembly on its arc shape bed called pilot brake caliper, mechanical and hydraulically operated means to transfer the friction power of pilot brake caliper after necessary amplification as needed for power braking action to main power brake caliper. a main power brake caliper fixed along with sliding mechanism on dead axle/body frame capable to receive the said amplified power to complete power braking function along with pilot brake caliper simultaneously on same brake disk, said self-activated power brake optionally comprising: one pilot caliper/brake shoe fitted on a orbit arc like shape sliding mechanism in reference of a brake disk/drum fitted on rotating axle near wheel, power transmitting means, which is an actuating mechanism that links Main power brake caliper to said pilot caliper that is mounted on the sliding mechanism as aforesaid, a main power brake caliper fitted on dead axle or stationary frame of vehicle/machine, duly linked to the said actuating mechanism/power transmitting means as aforesaid, a hydraulic fluid line connected to Pilot brake caliper cylinder from master cylinder having pedal or lever which has to be depressed for stopping motion of rotating disk/drum; wherein said main brake caliper comprising a conventional disk brake caliper cylinder with pads in case of disk brake or a customized brake shoe and cylinder as filed figures mounted in fixed holding part of the sliding mechanism as said in claim
 16. 20. The self-activated power brake as claimed in claim 16, wherein said main brake caliper comprising a conventional disk brake caliper cylinder with pads in case of disk brake or a customized brake shoe and cylinder as filed figures mounted in fixed holding part of the sliding mechanism as said in claim
 16. 21. A self-activated power brake comprising: a floating (sliding) brake caliper assembly on its arc shape bed called pilot brake caliper, mechanical and hydraulically operated means to transfer the friction power of pilot brake caliper after necessary amplification as needed for power braking action to main power brake caliper. a main power brake caliper fixed along with sliding mechanism on dead axle/body frame capable to receive the said amplified power to complete power braking function along with pilot brake caliper simultaneously on same brake disk, said self-activated power brake optionally comprising: one pilot caliper/brake shoe fitted on a orbit arc like shape sliding mechanism in reference of a brake disk/drum fitted on rotating axle near wheel, power transmitting means, which is an actuating mechanism that links Main power brake caliper to said pilot caliper that is mounted on the sliding mechanism as aforesaid, a main power brake caliper fitted on dead axle or stationary frame of vehicle/machine, duly linked to the said actuating mechanism/power transmitting means as aforesaid, a hydraulic fluid line connected to Pilot brake caliper cylinder from master cylinder having pedal or lever which has to be depressed for stopping motion of rotating disk/drum; wherein said master cylinder the actuating hydraulic mechanism comprising: a conventional or customized hydraulic cylinder which can be mounted in fixed part of sliding mechanism as said in claim 16, which can work as master cylinder during pilot brake caliper sliding up on getting friction force from rotating disk such that the generated friction power thrusts the piston of the said master cylinder which provides pressurized fluid through connected pressure line to main power brake caliper cylinder for performing power braking action.
 22. The self-activated power brake as claimed in claim 16, wherein said master cylinder the actuating hydraulic mechanism comprising: a conventional or customized hydraulic cylinder which can be mounted in fixed part of sliding mechanism as said in claim 16, which can work as master cylinder during pilot brake caliper sliding up on getting friction force from rotating disk such that the generated friction power thrusts the piston of the said master cylinder which provides pressurized fluid through connected pressure line to main power brake caliper cylinder for performing power braking action.
 23. A self-activated power brake comprising: a floating (sliding) brake caliper assembly on its arc shape bed called pilot brake caliper, mechanical and hydraulically operated means to transfer the friction power of pilot brake caliper after necessary amplification as needed for power braking action to main power brake caliper. a main power brake caliper fixed along with sliding mechanism on dead axle/body frame capable to receive the said amplified power to complete power braking function along with pilot brake caliper simultaneously on same brake disk, said self-activated power brake optionally comprising: one pilot caliper/brake shoe fitted on a orbit arc like shape sliding mechanism in reference of a brake disk/drum fitted on rotating axle near wheel, power transmitting means, which is an actuating mechanism that links Main power brake caliper to said pilot caliper that is mounted on the sliding mechanism as aforesaid, a main power brake caliper fitted on dead axle or stationary frame of vehicle/machine, duly linked to the said actuating mechanism/power transmitting means as aforesaid, a hydraulic fluid line connected to Pilot brake caliper cylinder from master cylinder having pedal or lever which has to be depressed for stopping motion of rotating disk/drum; wherein drum brake further comprises the actuating mechanism as claimed in claim 21 is a mechanical mechanism of oval shape instead of master cylinder type, when the pilot caliper engages to the said rotating drum, the oval shaped actuating mechanism tilts and engages the brake shoes by at least one mechanical means (E5).
 24. The self-activated power brake as claimed in claim 21, wherein drum brake further comprises the actuating mechanism as claimed in claim 21 is a mechanical mechanism of oval shape instead of master cylinder type, when the pilot caliper engages to the said rotating drum, the oval shaped actuating mechanism tilts and engages the brake shoes by at least one mechanical means (E5).
 25. The self-activated power brake as claimed in claim 22, wherein drum brake further comprises the actuating mechanism as claimed in claim 22 is a mechanical mechanism of oval shape instead of master cylinder type, when the pilot caliper engages to the said rotating drum, the oval shaped actuating mechanism tilts and engages the brake shoes by at least one mechanical means (E5).
 26. The self-activated power brake as claimed in claim 12, wherein said actuating mechanism is of eye shape so that when said pilot caliper engages to the said drum brake, said eye shaped actuating mechanism tilts and engages the brake shoes by hydraulic means (E6). 